Brass Spring Check Valve imapangidwa ndi mkuwa wonyengedwa, womwe umatchedwanso kuti valavu yosabwerera, yomwe imapangidwira kuwongolera kayendedwe ka madzimadzi, madzimadzi amayendetsedwa ndi diski ndikuyenda mbali imodzi, yomwe imagwiritsidwa ntchito kwambiri popanga mapaipi, kupopera, ndi mapaipi.